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Abstract

The Open Software Foundation (OSF) Distributed Computing Environment (DCE) Distributed Time Service (DTS) entity must be configured manually after each startup. This disclosure proposes a new option provided at startup to enable the DTS entity to restore its previous configuration. The option allows the DTS entity to restore configuration information that was set during the last instantiation of the DTS entity.

Country

United States

Language

English (United States)

This text was extracted from an ASCII text file.

This is the abbreviated version, containing approximately
51% of the total text.

The Open
Software Foundation (OSF) Distributed Computing
Environment (DCE) Distributed Time Service (DTS) entity must be
configured manually after each startup.
This disclosure proposes a
new option provided at startup to enable the DTS entity to restore
its previous configuration. The option
allows the DTS entity to
restore configuration information that was set during the last
instantiation of the DTS entity.

Each time one
of the following Distributed Time Service Control
Program (DTSCP) commands is processed, the DTS entity keeps a record
of the configuration characteristic affected in a protected file:
o
Advertise
o
Create
o
Enable
o
Delete
o
Set
o
Unadvertise

The DTS
entity then could be restarted using the syntax "DTSD
-r" (for Restore) to restore previously saved configuration without
the need to re_invoke the same DTSCP commands.

This
enhancement allows the DTS entity to save its
configuration and restore it at startup.
This function is
accomplished by introducing a new optional input parameter at the
start of DTS entity, this is:
-r For 'Restore'.

The restore
option can be invoked as follows: "DTSD -r". The
Figure illustrates an overview of the DTS Save and Restore design.
The DTS entity when started with no input argument (i.e., DTSD) will
function as shipped by OSF version 1.0.3.
In addition to the
original startup functionality, the default configuration is saved to
the protected file 'dtsconfg', overwriting the previous
configuration.

Each time one
of the Advertise, Create, Enable, Delete, Set or
Unadvertise DTSCP commands is successfully processed by the DTS
entity, a new routine is called to write the DTS configuration to the
protected file 'dtsconfg' recording the modified characteristics.

When the DTS
entity is started using the Restore input
parameter (i.e., DTSD -r) the following is done:
o
After the DTS entity initialization is completed, the DTS Entity
looks for the file 'dtsconfg' to
restore the previous
configuration.
o
If this file doesn't exist, a default configuration is used.
The
default configuration is currently
hard coded as the startup
configuration for the DTS entity.
o
If the file is not readable, the version number does not match
the current DTS entity version
number, the DTS entity Type
(Server or Clerk) is not valid, the
Create Flag is not valid or
the Advertise Flag is not valid, an
error message is then
issued
and the DTS entity exits.
o
If 'dtsconfg' is available and has valid data, then a series of
DTSCP command directives
(DirectiveCreate(), DirectiveSet(),
DirectiveEnable(), and
DirectiveAdvertise() ) are executed
based
on the records retr...